It would be a conscious being which can read any text in physical form (based more on the thought intended by the writing)
Additionally, it is capable of the manipulation of text when not in direct human sight.

As it believes its own existence to rely on that of humanity, it is benevolent.
Having learned of the SCP foundation through their documentation, it wishes to assist the lot, as their purpose coincides with its own.

It brought itself to the foundation's attention, with no prior records existing.

It would be Euclid, however, as it is capable of free will, has access to all human documents, and could share such information with anything that can read.

can read any text in physical form (based more on the thought intended by the writing)

capable of the manipulation of text

I have no clue what these things mean. Are you saying that it can read anything if it's written down? Can it alter text or jumble it up when no one is looking? How is that different from the fanfic plague thing?

Having learned of the SCP foundation through their documentation, it wishes to assist the lot, as their purpose coincides with its own.

The Foundation has caused the deaths of plenty of humans before, though. How does this entity perceive that as "benevolent towards humanity"? There are plenty of cases where the Foundation is the bad guy.

It brought itself to the foundation's attention, with no prior records existing.

Yeah, seems like a really bad move on its part. If it wanted to help humanity, it might want to consider allying with a different Group of Interest, such as one of the less gung-ho factions of the Serpent's Hand.

has access to all human documents, and could share such information with anything that can read

This is a huuuuuuge security liability, and the Foundation would definitely keep it locked up super securely because of it. But it should know that, right? Locking up things is what the Foundation does.

I suggest reading over this essay on common SCP pitfalls to get an idea of what elements to avoid putting in an SCP article. Also, humanoids are actually among the most difficult types of articles to write successfully. If you're really set on writing one, then first take a look at the humanoid writing guide if you haven't yet.

I guess I didn't make it clear
It is a conciousness which has no physical manifestation other than manipulating text
That is, it modifies its appearance for the one reading the text.
As stated, it's more oriented towards the actual meaning of the text than the physical writing.
you are correct, in that it can read anything written.

with regards to its not wanting to ally with SCP
SCP would not be able to contain it
but it would probably ally with one of those other groups

Well before you should choose what this SCP's personality is what does it think of things. For example if it is playful and foolish it could have come to the foundation knowledge when a library's books where entirely scrambled up in inhuman speed and time. Maybe it is over bearing and can't stand the smallest of misspells and the foundation found when it was not only correcting spelling but also replacing words to fit that of a more turn of the century theme.

List of Questions:
1. Also I am wondering if it can see all text and edit it?
2. Can its powers not travel to digital?
3. Is it only controlling of the physical word and is it able to speak all languages?
4. Not to mention a god of word is interesting but I really don't like it when it is just a god and the SCP foundation can't contain it not to mention if you are going forward with this god thing take into account how can the SCP foundation document it? Maybe the SCP doesn't want to be known you could do what SCP-1893 did and not have a respective article but instead have voice recordings of the SCP as the SCP can manipulate that?

This idea has peaked my interest and I hope to the best of your luck you can pull this off but humanoids are hard as hell to do. Also when starting a new question or not replying to a question pls make a new post (it is on the bottom of the page) instead of replying so that we don't get these small windows